Boiler-flue cleaner.



PATENTE PEB. 12, 1907. t P. THOMSON Boum ELSE GLBMJER.

AEPLIUATION FILED APR. 12, 1906.

TUNlTED. STATES JAMES P. THOMPSON,

Param cierren. 'Y

or HAGAN, esonera.

BOlLlEFl-EFLUE CLEANER? Specicaton of Letters atent1 l Patented Feb. 12,1907.

Appiimionriea Apriiiz, 1906. serial No. 3111350.

of Georgia, have invented new and useful Improvements in rBoiler-FlueCleaners, of

i which the following is a speciiication.

My invention pertains to boiler-flue cleaners and it contemplates theprovision of a simple and durable boiler-flue cleaner and lone which maybe adjusted with facility in order to enable its scraping portions towork' to the best advantage in the Hue that is to be cleaned.

With the foregoing in mind the'invention will be fully understood fromthe following description and claims when the same are read inconnection with the accompanying drawings7 forming part of thisspecification, in which- Figure l is a perspective view of theboilerflue cleaner constituting the present and preferred embodiment ofmy invention. Fig. 2 is a longitudinal central section of the same. Fig.3 is a transverse section taken in the plane indicated by the line 3 3of 2, and Fig. 4 is a detail perspective view of the stock of thecleaner removed.

Similar letters designate corresponding arts in all of the vviews of thedrawings, referring to whichp .A is the stock of my novel boiler-fluecleaner. The said stock is preferably of cast-iron and lis provided withapertures' a and longitudinal edge flanges b and is also provided with arearwardly-extending threaded stem c, the latter being for theconnection of an appropriate handle, which l have deemed it unnecessaryto illustrate.

B B are the blades of the cleaner, whichv are formed of steel and aretherefore possessed of; resiliency for a purpose'which will resently beunderstood. 'lhe said blades are disposed at opposite vsides of thestock A and between the anges t, whereby they are held against movementin the direction of the width of the stock, and they are con- -nected tothe stock, preferably through the medium of rivets d. (Best shown inFigs. 2

and 3.) At their forward ends the said blades B are provided withangularly-dis'- posed scraping portions C, the outer edges of whichdescribe parts lof a circle, as will be apparent by referenceto Fig. l yf D is an adjusting-screwA bearing in a threaded aperture c in one ofthe blades B and having a head or nger-piece f at its outer end, and Eis a locking-nut, preferably of the wing type, `mounted on the screw Dand designed to be set against the outer sider of that blade Bin whichthe screw D bears, as shown. At its inner end the screw D bears against`the inner side of the other blade B, and hence it will be understoodthat when the nut E is turned outwardly or away from the blade Badjacent thereto and the screw D is turned inwardly the scraping-portions C will be moved away from each other and adapted to be used tothe best advantage in a flue of comparatively large diameter.

It will also be understood that when after the adjustment of the screw Dthe nut E is turned up against the adjacent blade B `the screw D will besecurely locked, with a view of precluding casual turning ofthe same andthe casual movement of the scraping portion C, which would attend casualturning of the screw.

It will further be understood that the resilient blades B tend to restin and return to the positions shown in Fig. 2 relative to each other,and from this it follows that when the screw D is turned outwardly inthe a erture e the blades B will move toward eac other and in that wayadapt the scraping portions C for use in a flue of comparatively smalldiameter. l

In virtue of the construction of my novel flue-cleaner the blades areadapted to be detached from the stock, and'consequently in case of wearthe blades can be hammered out in a short time, after which they may beagain connected to the stock and used iii the manner described.Moreover, when the blades are worn beyond repair new blades may besubstituted for the same, and in this way the usefulness of the cleaneras a whole may be prolonged for an indefinite eriod.

The longitudinal edge anges b on the stock A constitute importantfeaturesof my invention, inasmuch as they serve to preclude movement ofthe blades B in the direction of the width of the stock and in that wayremove strain from the rivet connection between the blades and the stockand lessen the liability of the blades being casually `disconnected fromthe stock while the cleaner is being used in a boiler-diie.

IOS

lieve specifically described the construetion and relative arrangementof gerts embraced in the present and, preferre embodiment o-'my'invention in order to impart e definite understanding of the seidembodimerit. l do not desire, however, to be understoocl; es confiningiiiyseli to the seid speeie construction end relative arrangement ofperte, es suoli elienges vor modifications may be meile iii raetiee es'fairly fell within the scope oimy c aimed invention.

Hering l Liese/rises my inventiim,l what l Gleim. end desire to secureby Letters Petent,

The herein-described boiler-ique cleaner seems tending outward at rightegles to their mein portions; one oi' seid' blades also herring e, e

threaded aperture :it en, intermediate point of its length, meansextending through one of the blades, tlieintermediate 'portion of thestock and the other ble-de in the order named and .Connecting the bladesto the steelt. l. screw bearing in the threaded aperture or one bladeand arranged with its i mier end egeirist the inner side of the otherbla-cle end lier/*ing its outer end flattened to ferm {tiger-pieee end@wing-nut mounted on the seid screw between the outer side oi the bladein Whieh the screw bears and the buter .let end, et the screw.

ln testimony Wlieree'i' l lieve hereunto set my hand in presence of 'twosubscribing; nesses,

